Home / 1,643.56-2,265.40-1,165.17

Finding the Fourth Proportional to 1,643.56, 2,265.40 and 1,165.17

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Solution

The fourth proportional to 1,643.56, 2,265.40 and 1,165.17 is: 1,606.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,643.56 : 2,265.40 = 1,165.17 : x
  2. Step 2: Convert to fraction form
    1,643.56/2,265.40 = 1,165.17/x
  3. Step 3: Cross multiply
    1,643.56x = 2,265.40 × 1,165.17
  4. Step 4: Simplify right side
    1,643.56x = 2,639,586.07
  5. Step 5: Solve for x
    x = 2,639,586.07/1,643.56
  6. Step 6: Final answer
    x = 1,606.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.